Depth sounder



FIG. 1 is a front perspective view of a depth sounder showing my new design;

FIG. 2 is a rear perspective view;

FIG. 3 is a front elevational view;

FIG. 4 is a rear elevational view;

FIG. 5 is a top plan view;

FIG. 6 is a bottom view thereof; and

FIG. 7 is a left side elevational view, the right being a mirror image thereof. 

The ornamental design for a depth sounder, as shown and described. 